Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Takayasu, Kentaro; Onuki, Kenji*; Kawamoto, Koji*; Takayama, Yusuke; Mikake, Shinichiro; Sato, Toshinori; Onoe, Hironori; Takeuchi, Ryuji
JAEA-Technology 2017-011, 61 Pages, 2017/06
The Groundwater REcovery Experiment in Tunnel (GREET) was put into effect as development of drift backfilling technologies. This test was conducted by making the Closure Test Drift (CTD) recovered with water after carrying out a plug around 40m distance from northern edge face of horizontal tunnel of depth 500m, for the purpose of investigation of recovering process of rock mass and groundwater under the influence of excavation of tunnel. This report presents the efforts of backfilling investigation using bentonite composite soil and execution of backfilling into borehole pits excavated in the CTD which were carried out in fiscal 2014 as a part of GREET, and succeeding observation results inside pits from September 2014 to March 2016.
Takayama, Yusuke; Sato, Toshinori; Onoe, Hironori; Iwatsuki, Teruki; Saegusa, Hiromitsu; Onuki, Kenji
Dai-43-Kai Gamban Rikigaku Ni Kansuru Shimpojiumu Koenshu (CD-ROM), p.313 - 318, 2015/01
In the Mizunami Underground Research Laboratory, groundwater recovery experiment is being conducted to construct the method to understand the transition of geological environment due to groundwater recovery at the -500m access and research gallery-north. As a part of this experiment, backfill test is planned using drilling pits filled with artificial materials (clay and concrete) to evaluate the influence on the surrounding rock mass due to the interaction of rock and artificial materials. In this study, numerical simulation of the backfill test has been carried out to predict the qualitative hydro-mechanical behavior.
Takayama, Tomohiro*; Yaresko, A.*; Matsumoto, Akiyo*; Nuss, J.*; Ishii, Kenji; Yoshida, Masahiro*; Mizuki, Junichiro; Takagi, Hidenori*
Scientific Reports (Internet), 4, p.6818_1 - 6818_6, 2014/10
Times Cited Count:34 Percentile:81.71(Multidisciplinary Sciences)Ueda, Yoshio*; Oya, Kaoru*; Ashikawa, Naoko*; Ito, Atsushi*; Ono, Tadayoshi*; Kato, Daiji*; Kawashima, Hisato; Kawamura, Gakushi*; Kenmotsu, Takahiro*; Saito, Seiki*; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 88(9), p.484 - 502, 2012/09
no abstracts in English
Ishii, Kenji; Jarrige, I.; Yoshida, Masahiro; Ikeuchi, Kazuhiko*; Mizuki, Junichiro; Ohashi, Kei*; Takayama, Tomohiro*; Matsuno, Jobu*; Takagi, Hidenori*
Physical Review B, 83(11), p.115121_1 - 115121_5, 2011/03
Times Cited Count:73 Percentile:90.61(Materials Science, Multidisciplinary)Shimizu, Katsuhiro; Takizuka, Tomonori; Oya, Kaoru*; Inai, Kensuke*; Nakano, Tomohide; Takayama, Arimichi*; Kawashima, Hisato; Hoshino, Kazuo
Nuclear Fusion, 49(6), p.065028_1 - 065028_9, 2009/06
Times Cited Count:65 Percentile:89.57(Physics, Fluids & Plasmas)The self-consistent coupling of a Monte Carlo (MC) impurity code IMPMC to a divertor code SOLDOR/NEUT2D has been succeeded. MC modelling is required for impurity transport in order to take into account the kinetic effect and the complex dissociation processes of hydrocarbons. The integrated divertor code SONIC enables us to investigate the details of impurity transport including erosion/redeposition processes on the divertor plates by further coupling of an MC code EDDY. The dynamic evolution of X-point MARFE observed in JT-60U is investigated. The simulation results indicate that the hydrocarbons sputtered from the dome contribute to the enhanced radiation near the X-point. The kinetic effect of thermal force on the He transport is investigated for JT-60SA detached plasmas. Without the recycling, the kinetic effect improves the helium compression, compared with the conventional (fluid) evaluation. This effect is, however, masked by the recycling at the divertor targets.
Shimizu, Katsuhiro; Takizuka, Tomonori; Oya, Kaoru*; Inai, Kensuke*; Nakano, Tomohide; Takayama, Arimichi*; Kawashima, Hisato; Hoshino, Kazuo
Proceedings of 22nd IAEA Fusion Energy Conference (FEC 2008) (CD-ROM), 12 Pages, 2008/10
The self-consistent coupling of an MC impurity code IMPMC to a divertor code SOLDOR/NEUT2D is succeeded by overcoming the intrinsic problems of Monte Carlo (MC) modelling for impurity transport. MC modelling for impurity transport is required in order to take into account the kinetic effect and the complex dissociation processes of hydrocarbons. The integrated divertor code SONIC enables us to investigate the details of impurity transport including erosion/redeposition processes on the divertor plates by further coupling of an MC code EDDY. The dynamic evolution of X-point MARFE observed in JT-60U is investigated. The simulation results indicate that the hydrocarbons sputtered from the dome contribute directly to the enhanced radiation near the X-point. Without the recycling, the kinetic effect of the thermal force improves the helium compression, compared with the conventional (fluid) evaluation. This effect is, however, masked by the recycling at the divertor targets.
Maebara, Sunao; Zheng, X.*; Watanabe, Akihiko*; Kishiro, Junichi*; Takayama, Ken*; Horioka, Kazuhiko*; Ogawa, Masao*; Kawasaki, Sunao*; Shiho, Makoto
JAERI-Research 2004-007, 40 Pages, 2004/03
no abstracts in English
Morimoto, Iwao; Zheng, X. D.*; Maebara, Sunao; Kishiro, Junichi*; Takayama, Ken*; Horioka, Kazuhiko*; Ishizuka, Hiroshi*; Kawasaki, Sunao*; Shiho, Makoto
Nuclear Instruments and Methods in Physics Research A, 475(1-3), p.509 - 513, 2001/12
Times Cited Count:0 Percentile:0.00(Instruments & Instrumentation)no abstracts in English
Miyahara, Tsuneaki*; Ishii, Hiroyoshi*; Takayama, Yasuhiro*; Hirose, Masaaki*; Maruyama, Kenichi*; Obu, Kenji*; Shinoda, Motoki*; Muro, Takayuki*; Saito, Yuji; Matsuda, Tatsuma*; et al.
Journal of the Physical Society of Japan, 70(10), p.2977 - 2981, 2001/10
Times Cited Count:6 Percentile:41.78(Physics, Multidisciplinary)no abstracts in English
Morimoto, Iwao; Kishiro, Junichi*; Takayama, Ken*; Zheng, X.; Maebara, Sunao; Shiho, Makoto
JAERI-Research 2000-008, p.59 - 0, 2000/02
no abstracts in English
Maebara, Sunao; Morimoto, Iwao*; Zheng, X.*; Kishiro, Junichi*; Takayama, Ken*; Horioka, Kazuhiko*; Kawasaki, Sunao*; Ishizuka, Hiroshi*; Shiho, Makoto
Proceedings of 13th International Conference on High-Power Particle Beams (BEAMS 2000) (CD-ROM), 4 Pages, 2000/00
no abstracts in English
Maebara, Sunao; Morimoto, Iwao*; Zheng, X.; Kishiro, Junichi*; Takayama, Ken*; Kawasaki, Sunao*; Shiho, Makoto
Shingaku Giho, 99(498), p.63 - 66, 1999/12
no abstracts in English
Ishii, Kenji; Jarrige, I.*; Yoshida, Masahiro*; Mizuki, Junichiro; Matsumoto, Akiyo*; Kato, Akihiko*; Takayama, Tomohiro*; Takagi, Hidenori*
no journal, ,
no abstracts in English
Shimizu, Katsuhiro; Takizuka, Tomonori; Oya, Kaoru*; Inai, Kensuke*; Nakano, Tomohide; Takayama, Arimichi*; Kawashima, Hisato; Hoshino, Kazuo
no journal, ,
An integrated divertor simulation code SONIC has been developed. The self-consistent coupling of a Monte Carlo (MC) impurity code IMPMC to a divertor code SOLDOR/NEUT2D is succeeded by overcoming the intrinsic problems of MC modelling for impurity transport. MC modelling for impurity transport is required in order to take into account the kinetic effect and the complex dissociation processes of hydrocarbons. The dynamic evolution of X-point MARFE observed in JT-60U is investigated. The simulation results indicate that the hydrocarbons sputtered from the dome contribute to the enhanced radiation near the X-point. Without the recycling, the kinetic effect of the thermal force improves the helium compression, compared with the conventional (fluid) evaluation. This effect is, however, masked by the recycling at the divertor targets.
Ishii, Kenji; Jarrige, I.; Yoshida, Masahiro; Ikeuchi, Kazuhiko*; Mizuki, Junichiro; Ohashi, Kei*; Takayama, Tomohiro*; Matsuno, Jobu*; Takagi, Hidenori*
no journal, ,
no abstracts in English
Ozaki, Yusuke; Onoe, Hironori; Takayama, Yusuke; Takayasu, Kentaro; Takeuchi, Ryuji
no journal, ,
The purpose of this study is to identify factors that dominate the saturation in bentonite mixture material during drift closure test. The bentonite mixture buried in two pits in the test drift is monitored to evaluate its hydro-mechanical behavior during the test. To clear the factors effective to the saturation in the mixture, we perform numerical simulation focusing on the effect of swelling, hydraulic conductivity and unsaturated characteristics in the mixture. Our simulation results show that the unsaturated characteristics of the mixture have the greatest effect on the saturation in the mixture. For accurate estimation of saturation change in the mixture, unsaturated characteristics data is key information.
Ishii, Kenji; Jarrige, I.*; Yoshida, Masahiro*; Mizuki, Junichiro; Matsumoto, Akiyo*; Kato, Akihiko*; Takayama, Tomohiro*; Takagi, Hidenori*
no journal, ,
no abstracts in English